Migrate AuthFsHostTest to use MicrodroidBuilder am: d4244be26a am: 8a5f962ad0

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2060022

Change-Id: Ie748920482e150af70e315ea35d9157d251bad39
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>